Connecting 2 Macs

I've got an iBook G3 with a video out (standard, but am a newbie with this stuff). It's got a music program (MOTU's Composer Mosaic) that only runs on OS 9. And, no, it won't run in Classic mode. I now have a new iMac Core Duo, but I still would like to work on the iBook. How can I connect my iBook to the iMac, giving me a bigger screen size with which to work? Thanks in advance for any info.